Tutorials

One of the unique features of the PHM conferences is free technical tutorials on various topics in health management taught by industry experts. As educational events tutorials provide a comprehensive introduction to the state-of-the-art in the tutorial’s topic. Proposed tutorials address the interests of a varied audience: beginners, developers, designers, researchers, practitioners, and decision-makers who wish to learn a given aspect of prognostic health management. Tutorials will focus both on theoretical aspects as well as industrial applications of prognostics. These tutorials reach a good balance between the topic coverage and its relevance to the community. This year’s tutorials cover a range of topics. They include Deep Learning, Probabilistic Digital Twins, and Evaluating Machine Learning Models presented by subject matter experts with a deep understanding of the domain.

 

Date and Time: TBD
Tutorial Session 1: Probabilistic Digital Twin for Diagnosis, Prognosis and Decision-Making

Presenter: Professor Sankaran Mahadevan, Vanderbilt University

Description: The digital twin paradigm integrates information obtained from sensor data, physics models, as well as operational and inspection/maintenance/repair history of a physical system or component of interest. As more and more data becomes available, the resulting updated model becomes increasingly accurate in predicting future behavior of the system, and can potentially be used to support several objectives, such as sustainment, mission planning, and operational maneuvers. This tutorial will present recent advances in digital twin methodologies to support all three objectives, based on several types of computation: current state diagnosis, model updating, future state prognosis, and decision-making. All these computations are affected by uncertainty regarding system properties, operational parameters, usage and environment, as well as uncertainties in data and the prediction models. Therefore, the tutorial will also address uncertainty quantification in diagnosis and prognosis (considering both aleatory and epistemic uncertainty sources), and decision-making under uncertainty. Scaling up the probabilistic digital twin methodology to support real-time decision-making is a challenge, and several strategies that combine recent advances in sensing, computing, data fusion and machine learning to enable the scale-up will be discussed. Several use cases related to aircraft, rotorcraft, marine vessels, and additive manufacturing will be presented.

Speaker Bio: Professor Sankaran Mahadevan (Vanderbilt University, Nashville, TN, USA) has more than thirty years of research and teaching experience in uncertainty quantification, risk and reliability analysis, machine learning, structural health diagnosis and prognosis, and decision-making under uncertainty. He has applied these methods to a variety of structures, materials and systems in civil, mechanical and aerospace engineering. His research has been extensively funded by NSF, NASA, DOE, DOD, FAA, NIST, as well as GM, Chrysler, GE, Union Pacific, and Mitsubishi, and he has co-authored two textbooks and 330 peer-reviewed journal papers. During the past decade, he has been at the forefront of academic research on digital twin methodologies for aircraft, rotorcraft, ship structures, and additive manufacturing, funded by FAA, U.S. Air Force, U. S. Army, and NIST. Professor Mahadevan is currently Managing Editor of the ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, and has served as General Chair of several prominent conferences such as the AIAA SDM Conference, AIAA Non-Deterministic Approaches Conference, ASCE Engineering Mechanics Conference, and three PHM Society Annual Conferences, including PHM 2022. He is a Fellow of AIAA, Engineering Mechanics Institute (ASCE), and PHM Society. 

 

Date and Time: TBD
Tutorial Session 2: Evaluating Machine Learning Models for PHM: We’re doing it wrong!

Presenter: Neil Eklund, Novity

Description: Binary classifiers are incredibly common in asset health management: “normal or abnormal”, or “faulty or no-fault” are core questions in PHM. It is very common in the PHM literature to illustrate performance with the Receiver Operating Characteristics (ROC) curve, and compare models using the area under the ROC curve, or “AUC” (“area under curve”) statistic. However, the vast majority of PHM data sets are wildly imbalanced, e.g., 29,000 normal operations, and 13 faults. ROC plots can be misleading for the type of imbalanced data found in asset health management, due to an intuitive but incorrect interpretation of false alarm rate. This tutorial will provide an overview of statistical and graphical methods for comparing classifiers, and will highlight methods that provide clear visual cues and an accurate and intuitive interpretation of practical classifier performance using both real-world examples and simulation data.

Speaker Bio: Neil Eklund is one of the most innovative, forward-thinking researchers in the field of Prognostics and Health Management (PHM). With 20 years of deep technical experience in machine learning, data science, and industrial analytics, Neil serves as Principal Data Scientist at Novity, the industrial predictive maintenance venture recently launched by Xerox PARC. Before joining Novity, Dr. Eklund served as the Chief Data Scientist and Scientific Advisor at Schlumberger, where his work led to the creation of a new PHM-focused business segment, Technology Lifecycle Management. Prior to that, he spent 14 years in the Machine Learning Laboratory at GE Global Research where he was responsible for bringing advanced analytics as a shared service to GE businesses for better and faster utilization of the company’s industrial data assets. Dr. Eklund holds a Ph.D. in Machine Learning and he is also a PHM Society Fellow.

 

Date and Time: TBD
Tutorial Session 3: Deep Learning

Presenter: Dr. Lilach Goren Huber, ZHAW School of Engineering

Description: Coming soon!